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(No Model.) & v G. W. DITHRIDGE.

BEAM 0R SILL I No. 426,561. Patented Apr. 29, 1890.

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UNITED STATES GEORGE W'. DITIIRIDGE, OF NEIV YORK, N. Y.

BEAM OR SILL.

SPECIFICATION formingpart of Letters Patent No. 426,561, dated April 29, 1890.

Application filed August 28, 1889. Serial No. 322,180. (No model.)

To all whom it may concern:

Be it known that I, GEORGE IV.'DI'1HRIDGE, of the city, county, and State of New York, have invented a new and useful Improvement in Beams or Sills, of which the following is a specification.

My invention relates to beams or sills for buildings, elevated-railroad structures, and railroad carbodies; and my invention consists in a beam or sill having upper and lower members or bars formed of bars of rolled metal with rounded edges orflanges and verticallyplaced metal straps with hook-shaped ends to engage the rounded edges of the upper and lower bars, and cross-bolts to clamp and hold the parts together in forming the beam or sill.

In the drawings, Figures 1, 2, and 3 represent by cross-sectional views various forms or modifications of my invention.

The bars a I), eomposin g the upper and lower members of my improved beam or sill, are of heavy rolled metal, with flanges having rounded edges. The bars CL 1), Fig. 1, are T- shaped, those in Fig. 2 are cross or shaped, while those in Fig. 3 are curved, as half-circles, and central stiffening-ribs 3 may be employed in connection with this latter form. All of these bars a b have flan ges with rounded edges 5, and I provide vertieally-placed st raps 'c 66, preferably formed from plates or bands of rolled steel of any desired width and thickness, and said straps are formed with hookshaped ends 6, adapted to engage therounded edges of the upper and lower bars a b.

In Figs. 1 and 3 two straps c d are shown, one at each side, and in Fig. 2 the two straps surround and conform to the contour of the upper and lower members a b, and the middle and end portions of one strap are within the other, so that the sides lap. V

. The central clamping or tension bolts f serve to draw up the straps in forming the beam or sill, and the tubular sleeves or washers g around the bolts form stops against which the straps can be screwed up by the bolts and nuts.

In Figs. 1 and 2 I have shown at 6 central stay plates or blocks grooved on their edges for the reception of the inner flanges of the upper and lower members a Z), and the bolts f pass through-the stayplates, and the tubular sleeves or washers g are at each side thereof.

I claim as my invention- 1. The combination, in a beam or sill, ot the upper and lower flanged bars with rounded edges, and the vertically-placed straps with hook-shaped ends to engage said rounded edges of the flanges, and the connecting-bolts, substantially as specified.

2. The combination, in abeam or sill, of the upper and lower flanged bars with rounded edges, and the vertieallyplaced straps with hook-shaped ends to engage said rounded edges, the eonneetingbolts f, sleeves g, and

stay-plates c, substantially as set forth.

Signed by me this 22d day of August, A. D. 1889.

GEO. WV. DlTI-IRIDGE.

Witnesses:

GEO. T. PINCKNEY, WILLIAM G. Morr. 

